/**
 * Copyright 2015-2016 Knowm Inc. (http://knowm.org) and contributors.
 * Copyright 2011-2015 Xeiam LLC (http://xeiam.com) and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.knowm.xchart.internal;

import java.util.ArrayList;
import java.util.List;

/**
 * @author timmolter
 */
public class Utils {

  /**
   * Constructor
   */
  private Utils() {

  }

  /**
   * Gets the offset for the beginning of the tick marks
   *
   * @param workingSpace
   * @param tickSpace
   * @return
   */
  public static double getTickStartOffset(double workingSpace, double tickSpace) {

    double marginSpace = workingSpace - tickSpace;
    return marginSpace / 2.0;
  }

  public static double pow(double base, int exponent) {

    if (exponent > 0) {
      return Math.pow(base, exponent);
    }
    else {
      return 1.0 / Math.pow(base, -1 * exponent);

    }
  }

  public static List<Double> getNumberListFromDoubleArray(double[] data) {

    if (data == null) {
      return null;
    }

    List<Double> dataNumber = null;
    if (data != null) {
      dataNumber = new ArrayList<Double>();
      for (double d : data) {
        dataNumber.add(new Double(d));
      }
    }
    return dataNumber;
  }

  public static List<Double> getNumberListFromIntArray(int[] data) {

    if (data == null) {
      return null;
    }

    List<Double> dataNumber = null;
    if (data != null) {
      dataNumber = new ArrayList<Double>();
      for (double d : data) {
        dataNumber.add(new Double(d));
      }
    }
    return dataNumber;
  }

  public static List<Double> getGeneratedData(int length) {

    List<Double> generatedData = new ArrayList<Double>();
    for (int i = 1; i < length + 1; i++) {
      generatedData.add((double) i);
    }
    return generatedData;
  }
}
